[go: up one dir, main page]

CN1066892C - Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction - Google Patents

Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction Download PDF

Info

Publication number
CN1066892C
CN1066892C CN95102295A CN95102295A CN1066892C CN 1066892 C CN1066892 C CN 1066892C CN 95102295 A CN95102295 A CN 95102295A CN 95102295 A CN95102295 A CN 95102295A CN 1066892 C CN1066892 C CN 1066892C
Authority
CN
China
Prior art keywords
data
protection
reproducer
master data
class
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN95102295A
Other languages
Chinese (zh)
Other versions
CN1116803A (en
Inventor
管原隆幸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JVCKenwood Corp
Original Assignee
Victor Company of Japan Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=12784390&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CN1066892(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Publication of CN1116803A publication Critical patent/CN1116803A/en
Application granted granted Critical
Publication of CN1066892C publication Critical patent/CN1066892C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/87—Regeneration of colour television signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/106—Enforcing content protection by specific content processing
    • G06F21/1063—Personalisation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00007—Time or data compression or expansion
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00137—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to contents recorded on or reproduced from a record carrier to authorised users
    • G11B20/00159—Parental control systems
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00188—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/00739—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction is associated with a specific geographical region
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00731—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction
    • G11B20/00746—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number
    • G11B20/00753—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags
    • G11B20/00768—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a digital rights management system for enforcing a usage restriction wherein the usage restriction can be expressed as a specific number wherein the usage restriction limits the number of copies that can be made, e.g. CGMS, SCMS, or CCI flags wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
    • G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
    • G06F2211/007—Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2101—Auditing as a secondary aspect
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2107—File encryption
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2113—Multi-level security, e.g. mandatory access control
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2149—Restricted operating environment
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00007—Time or data compression or expansion
    • G11B2020/00014—Time or data compression or expansion the compressed signal being an audio signal
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/10537—Audio or video recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2545—CDs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/84—Television signal recording using optical recording
    • H04N5/85—Television signal recording using optical recording on discs or drums
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/8042—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components involving data reduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/804—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components
    • H04N9/806—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving pulse code modulation of the colour picture signal components with processing of the sound signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Automation & Control Theory (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Technology Law (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Storage Device Security (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

在一种再现设备里，为了再现由诸如记录磁盘或广播系统的数据介质按主数据传送的原始信号，借助规定给该数据介质的并和主数据一起传送的介质保护数据，该设备包括一个部分(12)，用于产生规定给该再现设备的设备保护数据，一个部分(13)，用于把设备保护数据和介质保护数据组合起来以定义一个保护等级，和一个部分(14)，用于把保护等级施加给原始信号的受限制的再现，并根据保护等级发生的变化分步地改变限制。

In a reproducing apparatus for reproducing an original signal transmitted by a data medium such as a recording disk or a broadcasting system as main data, by means of medium protection data assigned to the data medium and transmitted together with the main data, the apparatus comprises a part (12) for generating device protection data specified for the reproducing device, a part (13) for combining device protection data and medium protection data to define a protection level, and a part (14) for A protection level is applied to the restricted reproduction of the original signal, and the restriction is changed in steps according to changes in the protection level.

Description

The guard method of data reproduction and have the reproducer of data reproduction protection
The present invention relates to a kind of data reproduction guard method and a kind of data reproducing equipment of realizing this guard method, thereby,, can optionally be limited as the digital video signal that has write down with the signal that numerical data is represented.
Hereinafter; term " data medium " is understood on a kind of very wide significance; for example be applied to send the broadcast system of the data that resemble the video and/or audio data; receiving data in this situation can be to reproduce the object of protection; and for example be applied to resemble the recording medium of any kind of recording disc or tape etc., the replay data that obtains from this recording medium can be to reproduce the object of protection in this case.Reproduce to protect to be used as and optionally limit watching, listening to or duplicating data.
In the prior art, dissimilar reproduction guard method has been applied in the broadcast world such as CATV (cable TV) and satellite television.A kind of method is that video that is sent and voice data are carried out encryption, and a copyright code is inserted in the data, thus data are divided into the part that can freely reproduce and must pay after could reproduce wherein section data.After the program that must pay the bill is received by a receiving system, have only after the terms of payment that satisfy regulation, this program could decrypted and reproduction.
Under the situation of recording medium, a kind of reproduction guard method that can be applicable in DAT (digital audiotape register) register system is SCMS (a serial copy management system).Utilize this method, having one from the playback DAT signal of DAT reproducing device contains one and duplicates main ID (sign) number that forbids code, thereby guarantee single (duplicate and allow-duplicate a to forbid) sequence, like this, the user can only make the single copy of the digital audiotape of prerecording.
But, utilize these prior aries of reproducing protection to have only two kinds of control possibilities, that is, can reproduce maybe and cannot reproduce.The reproduction restriction of the degree of gradually changing can't be provided the signal that transmits by data medium so far.Therefore, such reproduction guard method only can be used for single purpose, for example, is used for the management of reimbursement of expense, perhaps is used for copyright protection.In addition, because the data that will protect only exist on transmitting medium or recording medium before reproducing, utilize the reproduction guard method of such prior art that the restriction of distinct program can not be provided reproduction according to some condition of reproducer.And in some cases, the protection degree may be very severe, or very lax, the therefore protection of very difficult acquisition significant degree.For example, the scene that is recorded in some type on the video tape, may allow to watch such as the U.S. in some country, but may be unallowed in other country.Therefore guarantee that this point should be favourable, promptly selling to when playing on the reproducer that these other national public uses, can automatically use to reproduce and protect, make above-mentioned scene not reproduced, perhaps clearly do not reproduced when such video tape.But in the prior art, such performance is impossible.
A purpose of this discovery is by a kind of reproduction guard method and equipment are provided; thereby on behalf of the data of primary signal, the information of reproducing degree of restriction with the regulation primary signal transmit (promptly by recording medium or signal transmission medium); thereby this reproducer that transmits data generates the information that the regulation primary signal is reproduced degree of restriction by operation; and thereby the combination of the restricted information that generates based on the restricted information that is transmitted by data medium with by reproducer obtains in fact to be applied to the information of the specified limit degree that primary signal reproduces, and overcomes the problems of the prior art of stating above.
More specifically, the invention provides a kind of reproduction guard method, comprising:
The media protection data are appended on the master data that is transmitted by data medium, and described master data is represented primary signal;
By this data medium, this master data and these media protection data are offered a reproducer;
Generate the equipment protection data by this reproducer;
By protection class is determined in the combination of these media protection data and these equipment protection data; And
This protection class of data is controlled this reproducer, reproduces primary signal to utilize master data.
Another object of the present invention is by providing a kind of reproducer with reproduction protection to overcome the problems referred to above; this equipment is used to operate the master data of representing primary signal and the media protection data of representing the media protection grade operates; described master data and described media protection data are transmitted by data medium, and this equipment comprises:
Detect the device of described media protection data, to obtain the media protection signal of a described media protection grade of expression;
Produce the device of the equipment protection signal of indication equipment protection class, this equipment protection grade has been assigned to described reproducer;
To described media protection signal and described equipment protection signal respond, to determine the device of final protection class according to described media protection grade and described equipment protection grade;
Be used for by utilizing described master data to carry out the device that described primary signal is reproduced, it comprises the device that optionally limits described reproduction according to described final protection class.
Therefore by such reproduction guard method and equipment, can determine protection class according to these media protection data, and can determine according to the wish of data medium manufacturer or according to master data copyright owner's wish.In addition, in fact applied protection class (being final protection class) also is according to being determined by the equipment protection data that the maker or seller of this reproducer is stipulated.Thereby; when master data is reproduced (for example; during reset a recording disc or tape); by means of by the determined limiter stage that grades of final protection class; promptly, realize the limiter stage that grades that reproduces according to the determined limiter stage that grades of combination of the requirement of the maker or seller of the requirement of the copyright owner of master data or data medium manufacturer and reproducer.By this way, can guarantee the visible flexibility on the selectivity restrict reproduction of signal, these signals for example transmit by recording disc or tape or by broadcast system.
In fact, the present invention allows such reproduction is limited in the specific frame group that is applied to vision signal or in the frame sequence, perhaps is applied in the specific region in each frame sequence.
Fig. 1 is a total system calcspar of first execution mode of the present invention, and it is a CD-audio player that has according to reproduction protection of the present invention, is used for describing basic principle of the present invention;
Fig. 2 is a matrix diagram, is illustrated in according to an example how determining final protection class in the reproducer of the present invention;
Fig. 3 is an example of how to specify the media protection grade;
Fig. 4 is a how example of designated equipment protection class;
Fig. 5 is the total system calcspar of second execution mode, and it is a concrete structure of the equipment of Fig. 1, wherein protects control to be applied to data and takes off the compression section;
Fig. 6 represents, in three kinds of vision signal different protection control methods, and the example of the relation between final protection class value and the video pictures visibility;
Fig. 7 is the total system calcspar of the 3rd execution mode; It is a kind of concrete structure of the equipment of Fig. 1, and protection control therein is applied to the rabbit control section;
Fig. 8 is a schematic diagram, illustrates how can time shaft protection control and spatial domain protection control to be applied to have on the vision signal of the present invention;
Fig. 9 is a figure, illustrates how to transmit video data, voice data and protected data according to the MPEG1 standard in data flow;
Figure 10 is the calcspar of an in-built example of the rabbit control section in the execution mode of Fig. 7;
Figure 11 is the total system calcspar of the 4th execution mode, and it is a kind of concrete structure of Fig. 1 equipment, and protection control therein is applied to rabbit control section and audio reproducing control section;
Figure 12 is that three kinds of different protection control methods are represented the example that concerns between final protection class value and the audio signal audibility;
Figure 13 is the calcspar of the in-built example of audio reproducing control section in Figure 11 execution mode;
Figure 14 is a matrix diagram, illustrates by the 5th execution mode of the present invention how can be the variable scope of final protection class value defined;
Figure 15 is the total system calcspar of the 5th execution mode, wherein can revise final protection class by a switch that is provided with on the operation reproducer; And
Figure 16 is each analog value of equipment protection grade, and the relation between the position of revising switch in media protection grade point and Figure 15 execution mode is described.
Now the embodiments of the present invention will be described; data medium is assumed to a kind of recording medium therein; CD (Compact disk) specifically; have the video and the audio signal data that are recorded thereon; hereinafter, this data of representing primary signal that will be reproduced from data medium will briefly be called master data to distinguish with the protected data that is also transmitted by data medium as described later.Further supposition, before record, original vision signal and audio signal are encoded by the efficient compaction coding method that adopts the MPEG1 algorithm.This MPEG1 algorithm for example be illustrated in by Yasuda edit in " international standard of multimedia coding " book that the Maruzen of Japan company publishes.Fig. 1 is a figure, is used for illustrating the summary characteristic of reproducing guard method and reproducing protection equipment.
Be located at the protection information on the recording medium
With reference to figure 1; to the notion of media protection data be described at first; in Fig. 1, be recorded in data on the CD (Compact disk) 1 and read input signal from dish with the demultiplexer 10 that obtains CD-audio player 2; CD-audio player is to represent with the form of calcspar, and it is constructed according to the invention in order to provide reproduction to protect control.Adopt the MPEG1 compressed encoding, CD1 has by digital data record video and audio signal (being called master data hereinafter) thereon.Also be recorded on the CD1 according to the predetermined protected data of the content of master data, protected data will be called as the media protection data.As described below, the media protection data are included in employed information in the reproduction that optionally limits master data.The media protection data can for example be recorded in the header area of the main code of CD1 and subcode, perhaps are recorded in the user area of packed data.The data represented protection class of this media protection is referred to as the media protection grade, and it for example can take from 1 to 5 value that increases progressively by 5 grades, as shown in Figure 2 and will illustrate below.Under this situation, the media protection data are with 3 bit representation media protection grades.If for video data and the voice data that has write down provides the grade of media protection separately, then they can be represented with two groups 3 (numbers).The number of media protection grade is high more, the degree of protection big more (promptly the degree of restriction of the reproduction of recording of video or audio signal is big more).To reproducing the realization of restriction, for example under the situation of video data, can be on the equipment of Fig. 1 by to reaching of obtaining from CD1 such as operating with the replay data that generates outputting video signal, this will or produce embedded figure on the particular section on display frame All Ranges as a result, and will be as described below.
Media protection grade with the media protection data representation is that perhaps master data and copyright owner's wish is predetermined according to the wish of the maker or seller of this data medium (CD1).Fig. 3 represents the example of two media protection data, five values of each expression media protection grade.In first example, reproduce restriction and be based on separated film system (being film rank system) that the U.S. adopts.Be that the media protection data do not apply any reproduction restriction under the situation of film of " free " in a part of class.If film be categorized as " PG " (being that parents instruct), then apply with moderate restriction (protection class 1), the rest may be inferred to " R ", level and " X " level increase limited degree.In second example, reproduce the power of restriction based on the copyright owner, when protection class when 1 is increased to 5, the limited degree that increases progressively increase to reproducing is provided.
The media protection data are the data of at least one above-mentioned media protection grade of expression and the combination of protective position information, and the protective position information specifies applies the position (among the master data behind the coding) of protection.Basic characteristics of the present invention are that the media protection data can be that unit specifies the media protection grade by the frame of vision signal.That is to say, can control the reproduction restriction of single frame.In addition, can also determine the reproduction restriction of (or in a particular frame series) one or more specific regions in the particular frame by the media protection data in advance.In this case, for example, in the last display frame that outputting video signal obtained of Fig. 1 equipment, the zone of being made up of the pixel block of some fixed dimensions can be converted into the zone of a blank, is perhaps filled by mosaic.This that is to say that protective position information not only can be used to stipulate a specific frame, also can be used to the one or more specific zone of stipulating that a frame is interior.
Alternatively, protective position information can be identical media protection grade of integral body regulation of each video signal frame group series, perhaps is the identical media protection grade of one or more specific region regulations in each frame group series.
Because unnecessary record CD1 goes up the explicit data that constitutes protective position information, used " protective position information " this term here.Replace, this information can be made of some positions in the primary traffic behind the compressed encoding that is recorded on the CD1 inherently, and each media protection data are being set on these positions.For example, can construct this equipment like this, be a media protection data division if nestle up the front of the coded data of a video signal frame, and then this indicates this media protection data division and imposes on this frame.If the media protection data division is to impose on one or more zone in this frame; rather than impose on entire frame; then in recorded data, nestle up and to comprise in the media protection data division before the compressed coded frames that at least two are used for these each regional value, in order to stipulate position separately, these zones.In this case, the clear and definite protective position information as a media protection data part must be recorded on the CD1 as data.
Protection information by the reproducer generation
By method and apparatus of the present invention, can construct a kind of reproducer, in order to produce the specific protected data of predesignating of giving this reproducer.For example; CD1 among Fig. 1 is play by reproducing device 2; reproducing device 2 have one be assumed to be ROM (read-only memory) but preset memory equipment, the latter produce the expression protection class the equipment protection data, this protection class is called as the equipment protection grade hereinafter.The equipment protection grade is to be stipulated in advance by the maker or seller of this reproducer.According to the mode identical with the media protection data recited above, the equipment protection grade can be got a plurality of values, with each the different reproduction limited degree corresponding to the master data that obtains from data medium.With the quantity of hypothesis equipment protection grade point is four, promptly from 1 to 4, and the equipment protection data can be made up of two positions like this.The equipment protection number of degrees is high more, and it is big more that the degree of protection becomes, and the degree of promptly reproducing restriction is big more.
The content of equipment protection data ROM can not be rewritten by the user.In the execution mode of Fig. 1, whenever this equipment is connected primary power source, go up the readout equipment protected data, after this according to by the equipment protection grade of equipment protection data regulation with by the combination execute protection of the media protection grade of media protection data defined from this ROM.
How Fig. 4 represents three examples of designated equipment protection class.In first example, according to the national preset device protection class that uses this reproducer.For instance, if this reproducer uses in the U.S., then might be changed to low value such as 1 protection class is set.Be used at reproducer under the situation of other parts in the world, such as Europe, Japan and Taiwan, they have in various degree restriction to video software, and the equipment protection grade can be changed to higher value, as shown in FIG..By this way; the unallowed video scene of institute can be by cancellation (partly or wholly) automatically in the country; promptly be used in combination equipment protection grade and media protection grade, realize through in final display frame, inserting the embedded figure zone by what describe below.
In second example among Fig. 4, the equipment protection grade is predetermined according to the people's of this reproducer of use of expecting type.For instance, if this reproducer is only used by the adult, then the equipment protection grade can be set to the low value such as 1.If this reproducer will be used by children, the equipment protection grade can be set to a high value such as 4.By this way, be considered to be unwell to partly or wholly restrict reproduction of children's video scene or audio content.
Under the situation of the 3rd example in Fig. 4, the protection class by the setting of equipment protection data is predetermined according to the applied environment that uses reproducer.For example; if this reproducer is sold to the public; then the equipment protection grade can be set to a value such as 1 or 2; if instead this equipment plan is to use in the shop for the purpose of demonstration; then the equipment protection grade can be changed to a different value; as 3 or 4, and the equipment in the control chart 1 makes to have only interested some scene of possible client in those shops to obtain showing.By this way, the equipment protection grade can be set according to the application purpose of reproducer.
With reference to figure 1, the overall characteristic of reproducing protection will be described now.At first, the data that are recorded on the CD1 are read out, with the input signal as demultiplexer 10.Record data on the CD1 are made up of compressed encoding master data (being compressed encoded video and voice data), the latter and the multiplexing together of media protection data.Demultiplexer 10 separates compressed encoding master data and media protection data, and the media protection data is offered media protection input part 11 and the while offers video decoder part 15 to the compressed encoding master data.As described above like that, the media protection data are regulation protective position information or can comprise clear and definite protective position information inherently.Media protection input part 11 is used for detecting protective position information; and produce the protective position signal of a correspondence; those are subjected to the part (the piece district in for example specific video signal frame group, and/or the particular frame group) of media protection data effect in this signal indication master data.This protective position signal is provided for protection control signal generating portion 14.Further response media protection data are to produce the media protection signal of a correspondence for media protection input part 11, and the latter represents the media protection grade and is provided for final protection class determining section 13.
Final in this embodiment protection class determining section 13 is made up of a matrix ROM basically, the ROM of the relation schema between the combination of those various media protection grades of storage and equipment protection grade and result and the final protection class.The operation of matrix ROM is described with reference to the matrix diagram of Fig. 2; this matrix diagram represents the content of this ROM is how to read according to the combination of media protection grade point and equipment protection grade point; there are five probable values (indicating with A to E respectively) in final protection class, the reproduction limited degree that increases progressively by the order of A, B, C, D and E.Fig. 2 represents the example of final each value of protection class, and these values are to be determined by the combination of various media protection grade points and equipment protection grade point, i.e. value from the scope of A to E, and the value of these A to E is arranged on each intersection point of Fig. 2 matrix row and column.Therefore, for example the media protection grade is 4 and the equipment protection grade is 2, and then final protection class will be B.
Be necessary clearly to distinguish the ROM of equipment protection signal generating portion 12 and the matrix ROM of final protection class determining section 13.The content of the ROM of equipment protection signal generating portion 12 can be provided with according to the requirement of a concrete reproducer, and the content of the matrix ROM of final protection class determining section 13 is identical to a large amount of reproducers generally.
Final protection class determining section 13 generates an output signal, is referred to as final protection class signal, and it represents determined final protection class, and final protection class determining section 13 offers protection control signal generating portion 14 to this signal.This signal and protective position signal are responded, and protection control signal generating portion 14 produces a signal that is referred to as to protect control signal, and it is used to control a part that will be called video decoder part 15.For the simplification on describing, in this stage, only consider the reproduction of vision signal, and should be interpreted as that a handle converts the part of standard (simulation) vision signal to from the compression encoded video data (master data) of demultiplexer 10 to video decoder part 15.Along with the compressed encoding primary traffic flows into video decoder part 10 from demultiplexer 10; the protection control signal is being controlled video decoder part 15, such as apply the reproduction protection by the final protection class value of basis on each position of protective position information specifies in this data flow.Video decoder part 15 produces an outputting video signal like this, and it forms a video pictures, in the reproduction of this picture Rigen according to main (video) data of final protection class value restriction.As scrutable in the top description, according to the change of media protection grade, final protection class value can change in each interframe of vision signal.
To reproduce first example of restriction according to the explanation of final protection class, and wherein reproduce restriction and be by video decoder part 15 and realize by the expansion of master data and decoding are controlled.This example is described with reference to the execution mode of Fig. 5, and reproducer remains a CD and inserts equipment in this embodiment, by numeral 3 signs.With explanation only and the relevant operation of video data from the master data of CD1.In Fig. 5, a kind of concrete structure of having represented the video decoder part 15 of Fig. 1, by variable-length decoding part 15a, take off quantizer part 15b, inverse transformation part 15c and rabbit control section 15d forms, compression encoded video data offers variable-length decoding part 15a and generates from rabbit control section 15d from demultiplexer 10 and finally exports (simulation) vision signal therein.In this execution mode, video data is recorded on the CD1 after the compression that discrete cosine transform is handled being subjected to, and reproduces by the precision control that the inverse DCT (discrete cosine transform) that control is implemented by inverse transformation part 15C is handled and to limit.The combination that protection control signal that produce from protection control signal generating portion 14a and that be used for controlling inverse transformation part 15c is based on media protection data and equipment protection data is derived; described in the description of being carried out as top part 14, promptly protect control signal to apply control according to final protection class to Fig. 1.
The compression encoded video data of reading from CD1 after separating is subjected to variable-length decoding in variable-length decoding part 15a, take off quantification taking off in the quantizer part 15b then.Then, optionally adjusting under the situation of conversion process according to the protection control signal, resulting packed data is subjected to inverse DCT and handles in inverse transformation part 15c.Then, in rabbit control section 15d, handle the resulting packed data that takes off to obtain final outputting video signal.Effect by reproduction restriction control, that carry out in inverse transformation part 15c of protection control signal is optionally to generate the ambiguity or the form degree of embedded figure in utilizing final outputting video signal picture displayed.This ambiguity will be called the visibility grade.A visibility grade and an example that finally concerns between the protection class value A to E (they are as described above definite by protection control signal generating portion 14a, and represent with the protection control signal) in Far Left one row of Fig. 6, have been represented.If protection class is A, promptly the minimum limit that video data is reproduced then protects control signal to be changed to a kind of state that can not influence the operation of inverse transformation part 15c.If protection class is B; then protect control signal control inversion part 15c; such as to the piece size of 8 * 8 pixels (promptly with original DCT handles in applied identical piece size) operation the time; each piece is adopted the DC component value; but only adopt two AC conversion coefficients, all other conversion coefficient forcibly is changed to zero.Can cause the obvious decline of resolution in the display frame that generates based on outputting video signal like this.If protection class is C, then protect control signal control inverse transformation part 15c, when on the piece size of 8 * 8 pixels of video signal frame, operating, for each piece only adopts DC component (being that the DC component is the conversion coefficient of unique use).Under this situation, because all pixels in 8 * 8 pixel blocks have identical vision signal value, it will form embedded figure on the final picture that obtains.If protection class is D, then protect control signal control inverse transformation part 15c, when on the piece size of 16 * 16 pixels, operating, only adopt the DC component value.This causes the formation embedded figure equally, and the size of graph block is bigger than the situation of protection class C in this case, promptly forms the macro block embedded figure, the further like this visibility grade that has reduced result screen.If protection class is E; then the data of the video that obtains from inverse transformation part 15c are substituted by different video data (not producing in the source of expression from figure); as the final video signal that produces from rabbit control section 15d, and it will produce a predetermined picture or a plurality of picture the latter.This predetermined picture is such as showing the warning message that relates to copyright protection.
Under the situation of MPEG1 algorithm, in handling, adopts DCT the piece size of 8 * 8 pixels.Piece after the conversion is represented with a plurality of coefficients (AC coefficient) of each signal level value on the different frequencies that increase continuously of representing with a DC component (being the DC coefficient).Like this, if inverse transformation part 15c Be Controlled, make and in a kind of very simple mode, can reach weakening of stipulating on the resolution like this by the AC coefficient that for example in the inverse DCT operation of each piece, only uses DC coefficient and two low-limit frequencies whole (or a concrete part) display frame as a result.
If in inverse dct transform a piece is only used the DC component simply, and all AC systems are changed to zero, then in resulting vision signal as a result from the inverse DCT operation in the piece all signal level values of pixel be changed to an identical value.Like this, can form embedded figure at an easy rate utilizing in the resulting result screen of final outputting video signal.In addition, if for each 16 * 16 different pixel macroblock (be every form by four 8 * 8 pixel blocks), in the inverse DCT of all four 8 * 8 pixel blocks of constituting 16 * 16 pixel macroblock is handled, only certain 8 * 8 specific pixel block (is for example adopted the DC coefficient, the DC coefficient of the most upper left 8 * 8 pixel blocks), and all AC coefficients all are changed to zero, then will form one than with the embedded figure of 8 * 8 pixel block formation coarse the embedded figure of Duoing.
Be appreciated that like this; by the of the present invention above-mentioned execution mode on the video data that is applied to be subjected to efficient compressed encoding through adopting data to become to claim operation; by resolution degree to the picture of final acquisition; perhaps to the resolution degree of the part in this picture; realize progressively changing; can easily reach progressively change, and the progressively change on this resolution can be easily according to being controlled based on the final protection class of media protection data and the foundation of equipment protection data to the reproduction degree of restriction of this video data.Particularly, when this control is applied to inverse DCT and handles, might be the cell block of basic pixel value by utilizing for conversion process, realize that at an easy rate visibility is the progressively change of screen resolution.Such control of in each frame of vision signal, operating to visibility; Can think in (two dimension) spatial domain, to use protection.
By method for coding video data such as the DCT method, be made up of the der group of data from the output digital signal that the inverse DCT circuit produces, each data der group is made up of the continuous pixel value of each pixel in the cell block (as the piece of one 8 * 8 pixel) of video signal frame.For such digital signal being converted to conventional digital video signal, be necessary that the data that at first the inverse DCT circuit produced temporarily are stored in a video memory (as frame memory) lining, (promptly by the continuous pixel value on the continuous pictures trace interval) reads video data then in the correct order.This operation is the basic function of rabbit control section 15d in Fig. 5.Fig. 7 represents another embodiment of the invention; in this execution mode the control of reproducing protection is being applied on the video data that is produced by inverse transformation part 15c; promptly be applied to the rabbit control section according to the control that final protection class is undertaken by the protection control signal this execution mode Rigen; this section construction becomes can suitably respond the protection control signal, and 15d ' sign.Except these characteristics, the structure of this execution mode and operation are identical with operation with structure among above-mentioned Fig. 5.Rabbit control section 15d ' comprises a frame memory, temporarily writes among this frame memory from the dateout of inverse transformation part 15c, then by above-mentioned suitably calling over, to obtain final outputting video signal.
In the present embodiment, reproduce degree of restriction and be the frame of video that is used for constituting final outputting video signal by " desalination " and control, this desalination degree is definite by final protection class.This mode illustrates that in the middle column of Fig. 6 such control is called the time-domain protection in Fig. 6.In the example of Fig. 6, when final protection class is A, write continuously then that all video data frames are used to constitute final outputting video signal in rabbit control section 15d ' frame memory.If final protection class is B; then come the protection control signal control of video reproducing control section 15d ' of self-shield control signal generating portion 14b; make and to have only 1 video data frame to be used to constitute final outputting video signal among per 15 video data frames that provide by inversion part 15c; particularly; keep in cycle being stored in the frame memory of rabbit control section 15d ' at 15 successive frames from a video data frame in per 15 video data frames among the inverse transformation part 15c; and be repeated during this period to read, to constitute final outputting video signal.The operation of this sampling and maintenance type utilizes rabbit control section 15d ' lining frame memory to carry out, thereby the picture that finally obtains changed once per 0.5 second.If final protection class is C, then control of video reproducing control section 15d ' makes the content of frame memory only upgrade once in per 60 frame periods, and the picture that promptly finally obtains changed once per 2 seconds.If final protection class is D, then has only the video data of some particular frame (or a particular frame) to be written in the frame memory of rabbit control section 15d ' and be read out to obtain final outputting video signal.By this way, for example, only some video data (as part not protected by copyright) will be shown.If protection class is E, the video data that then pre-determines picture is written in the frame memory of rabbit control section 15d ', and is read repeatedly; thereby only show the predetermined picture of determining; it can be for example, to relate to the warning message of copyright protection.
Alternatively; can be undertaken by such arrangement the control of reproducing degree of restriction; the protection control signal of i.e. self-shield control signal generating portion 14b affacts on the rabbit control section 15d '; thereby change degree that (according to final protection class) each video data sampling provided number, promptly changing can be by the amplitude level of each sampled representation number.This is to be set to fixed value by one or more low levels of each data sampling, as 0, realizes.If for example LSB (lowest order) always is changed to 0, then possible degree number reduces half, thereby realizes the corresponding decline of the resolution of the display frame that finally obtains.The position of not fixing by this way in each numerical data sampling will be called the significance bit of sampling hereinafter.This extent control based on the valid data bit quantity is illustrated by the row on the right among Fig. 6.In this example; if final protection class is A; then come the protection control signal of self-shield control signal generating portion 14b not influence the work of rabbit control section 15d '; each video data sampling that is used to constitute outputting video signal like this has the significance bit of standard number, promptly 8.If final protection class is B, then protect control signal control of video reproducing control section 15d ' to make the quantity of significance bit/sampling of outputting video signal reduce to 4 (being zero promptly) by 4 lowest orders are given up.If final protection class is C, then protect control signal control of video reproducing control section 15d ', make that the quantity of significance bit/sampling is 2 (promptly all being changed to zero except that two highest orders), screen resolution further descends like this.Similarly, if final protection class is D, then rabbit control section 15d ＇ is controlled, and makes the quantity of significance bit reduce to 1.If protection class is E, the video data that then pre-determines picture is written in the frame memory of rabbit control section 15d ' and as final outputting video signal and is read repeatedly, thereby only shows predetermined picture.
Same possible is; as among Fig. 7 from protection control signal generating portion 14b be connected to the dotted line that takes off quantizer part 15b indicated; can arrange a protection control signal of coming self-shield control signal generating portion 14b to affact takes off on the quantizer part 15b; thereby change the quantity of significance bit that (according to final protection class) takes off each dateout of quantizer part 15b, this will provide with situation about controlling by rabbit control section 15d ' realizations recited above under similar effect.
Another can be used to control the method for reproducing degree of restriction, thereby uses the protection control signal control variable-length decoding part 15a of self-shield control signal generating portion 14b.In this case, the protection control signal is arranged to and acts on the variable-length decoding part 15a, make when protection class when A is increased to E, the data with long code length promptly are left in the basket by zero setting.This will cause the reduction of the resolution of the final picture that obtains from outputting video signal.
Should be noted that can be by carrying out reproducing the control of restriction the combination that acts on the control on the time shaft and act on the control of spatial domain (being in each frame).In Fig. 8 this point has been done schematic explanation, vertical line 20 representatives of order are recorded in the sequence frames (being simplified illustration, is identical with the final protection class of hypothesis with the media protection grade) of the vision signal on the CD1 in Fig. 8.With each video signal frame data division on the CD1 together, the media protection data division is recorded, it may comprise the positional information in a zone in the regulation frame, reduces to a degree according to final protection class display resolution on this zone.Two kinds of possible basic display situations that exist for each frame promptly do not show or show (under the situation that may form one or more resolution reduction zones) in this example.For reaching this point, the media protection data of giving each frame comprise one one sign, and its 1 or 0 logic state indicates this frame and shows or do not show.If flag bit indication frame does not show that this state is indicated with symbol " X " in Fig. 8, and when flag bit was indicated this frame by all or part of demonstration, this state was indicated with symbol " 0 " in Fig. 8.In the example of Fig. 8, " 0 " state of each regulation in ten successive frames that indicate with FA shows that each frame will be shown.In addition, the media protection data of each frame of these frames comprise the positional information that is used for illustrating a reduction resolution.Display frame as a result is with numeral 21 signs, and it contains reduction resolution district 22 rectangle and that represent with cross hatched regions.Reduce resolution district 22 and formed, to frame group F by a plurality of 16 * 16 pixel macroblock AEach frame; two macroblock address of the corresponding positional information regulation frame in the media protection data are (by 22a and 22b sign; be positioned at the lower right corner, the upper left corner of mosaic area 22), thus the position and the size of regulation rectangular area, and this rectangular area is to reduce to differentiate district 22.
Similarly, one group of four successive frame F BIn each frame be shown, but have in final display frame, form, indicate with numeral 24 one reduce the resolution districts.Under this situation; this reduction resolution district is made up of two adjacent rectangular areas; so two pairs of macro blocks in the frame of position must stipulate to(for) the positional information in the media protection data, the i.e. a pair of address of a pair of address of macro block 24a and 24b and macro block 24c and 24d among Fig. 8.
Be appreciated that in this situation,, applied and reproduced protection by to the control of time shaft with to the control combination in (two dimension) space in each frame.Be further appreciated that further the present invention allows to realize that it is determined according to final protection class to reproducing point-device control of restriction.
Under according to MPEG1 system transmissions data conditions (promptly based on the ISO-11172-3 standard), data send by continuous packet, and packet is a time division multiplexing, as by shown in the data flow among Fig. 9 40.Each bag is made up of such as part 42 leading part a such as part 41 and a master data part, leading part has the information that comprises initial code and fail to be sold at auction identifier, and flow identifier is distinguished the data of this bag transmission and the data (as distinguishing) that other bag transmits between video data, voice data and other data.In this example, each main portion is by forming such as the compression encoded video data of part 42 with such as the coding audio data of part 43, perhaps by forming such as the protected data of part 44.To suppose that in this example the protected mode shown in Fig. 8 is applied to video data; so can be independent protected data part of each appointment of a plurality of video signal frames; be that video data frame can be transmitted by different bags, there is a protected data bag front of each bag.In this case; each protected data bag in Fig. 9 example comprises 3 bit positions of a regulation media protection grade; 1 flag of frame (described in top Fig. 8) of stipulating whether this frame shows; regulation macro block is initial/and the end address (is used when forming the resolution district of at least one reduction in the frame, as is frame F among Fig. 8 the part of quantity AAnd F BEach), thereupon and then macro block initial/end address is to (for example the address of macro block 24a, 24b is right, is that the address of macro block 24c, 24d is right then, and they are used for Fig. 8 example frame F BEach).
Figure 10 represents to be used for a kind of concrete internal structure of Fig. 7 execution mode rabbit control section 15d '.In Figure 10; the dateout warp 50 of inverse transformation part 15c offers extent control part 51; in its two protection control signals that produce by protection control signal generating portion 14b one control; the dateout as a result of extent control part 51 is through 52 transmission of a switch, and switch 52 is by another protection control signal control.Data through switch 52 transmission write frame memory 53, and read continuously to form the successive frame of raw video signal by suitable order from frame memory 53.The digital video signal that produces from frame memory 53 is provided for D/A converter 54, to obtain an analog video signal as final output signal.
As long as switch 52 remains closed, the content of frame memory 53 was thoroughly upgraded once in each frame period of vision signal, made that the data of new frame can be read from frame memory 53 continuously.If but switch 52 stays open during the integer frame period, then the contents of frame memory 53 storage recently will repeatedly be read on each of these frame periods, and promptly last frame will be exported continuously.So clearly, if according to the state control switch 52 that is included in the framing bit in the media protection data, then this circuit can be realized the time shaft protection operation on successive frame described above.
Work is carried out in 51 pairs of each digital video signal samplings (usually, each data of 8) that provided by inverse transformation part 15c of extent control part, according to the low level of each sampling of final protection class setting.For example referring to one row of the left side among Fig. 6, if final protection class is B, then extent control part 51 is four all extreme lower positions of each sampling a predetermined value, as 0.If protection class is D, then seven all extreme lower positions of each sampling are 0.
If be applied within the video signal frame reproducing restriction; then protect control signal generating portion 14b response protective position signal during the respective frame one or more concrete time interval at interval, above-mentioned protection control signal to be imposed on extent control part 51; and each of these concrete time intervals be based on the macro block shown in Fig. 9 initial/of end address centering is definite, and is as described above.By this way, reproduce restriction and can be applicable on the interior specific region of frame, as shown in Figure 8, promptly above-described spatial domain protection operation can be employed.
Should be appreciated that, under the condition of reality, each " initial address " will in a frame period, define one corresponding to frame in the time shaft position of data sampling of top left pixel in rectangular area, and " end address " defines the position corresponding to the data sampling of this regional last cell pixel similarly.Can easily set up by the well-known this time relationship of treatment technology that is used for digital video signal, so detailed explanation has been omitted.
The reproduction protection of video data has only been described in the above-described embodiment.Figure 11 represents another embodiment of the invention, has used the reproduction protection of voice data and video data therein.With the difference of only describing between present embodiment and above-mentioned other execution mode.The CD reproducer of present embodiment and the CD reproducer difference among Fig. 7 are, the former comprises that the coded digital audio signal that is used for being recorded on the CD1 deciphers and take off the circuit of quantification, promptly by a variable-length decoding part 16a, one is taken off quantizer part 16b, a subrane built-up section 16c and the audio coding part that audio reproducing control section 16d constitutes.By demultiplexer 10, the compressed encoding voice data separates with protected data with video data in being included in input traffic, and offers variable-length decoding part 16a as the input data, and output audio signal is produced by audio reproducing control section 16d.The execution mode that present embodiment further is different from Fig. 7 is; the protection control signal generating portion 14c of present embodiment not only produces one first protection control signal; it acts on rabbit control section 15d ' or takes off among the quantizer 15b one; reproduce protection to apply vision signal by the figure place that changes each data; as above such in the face of the explanation of the protection control signal of Fig. 7 execution mode; and produce one second the protection control signal; it acts on audio reproducing control section 16d and goes up or take off quantizer part 16b and go up to apply audio signal and reproduce protection, as hereinafter.In order to simplify description, be to produce according to the final protection class of deriving (as described above) for the reproduction protection of video data with the hypothesis second protection control signal.But, usually, should think that promptly video data and voice data obtain independent final protection class for independent media protection grade of video data and voice data regulation and independent equipment protection grade.
Figure 12 is a table, illustrates to apply three kinds of possible methods that audio signal is reproduced protection under the situation of the execution mode of Figure 11.For each of three examples shown in Figure 12, can be to select five kinds of different audibilitys according to final protection class by the output audio signal that audio reproducing control section 16d produces, reproduce protection to realize audio signal.At first describe by the represented method of Figure 12 left column.In this case, use audio signal by the bandwidth that optionally limits the output audio signal that produces by audio reproducing control section 16d according to final protection class and reproduce protection.If adopt the MPEG1 audio signal compression, suppose that then sample frequency is 48KHz, can obtain the bandwidth of 24KHz to output audio signal.In this example, if final protection class is A, then do not apply any bandwidth constraints, promptly audio bandwidth is 24KHz.If final protection class is B, then audio signal bandwidth is restricted to 18KHz, if protection class is C, then bandwidth constraints is 12KHz, if protection class is D then bandwidth constraints is 6KHz, if protection class is E then does not produce any audio output signal.
Because the subrane coding that has 32 wave bands is adopted in the MPEG1 audio compression, by being affacted, the second protection control signal takes off on the quantizer part 16b, and feasible re-quantization value corresponding to some high frequency band is changed to zero, also can realize this bandwidth constraints.Therefore, can easily obtain protecting by the audio reproducing of bandwidth control.
With reference to the central array of Figure 12 second method with the protection of description audio signal reproduction.In this case, by make provide from subrane built-up section 16C and be used for audio reproducing control section 16d and go up to obtain the sampled audio signal value " thin out " of output audio signal, use the time shaft protection.In this example, if final protection class is A, then all audio sample value are used to derive output audio signal.If final protection class is B, then, during two continuous sampling periods, keep in per two samplings by sampling and holding circuit, promptly only in total sampling half is used to derive output audio signal.If protection class is C, have only a sampling to be used to derive output audio signal in then per three samplings, promptly in three continuous sampling periods, only keep one of them in per three continuous samplings.If protection class is D, have only those to be used to produce output audio signal in the sampling that specific interval occurs.For example, when the special part that only allows (by the copyright owner) recorde audio signal is reproduced, can carry out this operation.If final protection class is E, then do not produce any audio output signal.
With reference to the third method of the right column among Figure 12 with the protection of description audio signal reproduction.In this case, be similar to the mode that is used for video data described above, come execute protection control by the intensity grade number that audio data samples had is carried out control with a kind of.Generally, a digital audio and video signals has 16/sampling, when final protection class is A, then adopts these all 16 positions, does not promptly have the restriction to audibility.If final protection class is B, then effectively sampling resolution is reduced to 12 (minimum 4 that are each 16 sampling are fixed as 0), to cause the reduction of reproducing audio signal quality.If protection class is C, the quantity of significance bit further reduces to 8, if final protection class is D, then the number of significant digit of every sampling reduces to 4, and if final protection class is E, then do not produce any audio output signal.
Be appreciated that the combination according to media protection data and equipment protection data like this, recorded video signal accurately limits the reproduction of recorde audio signal when reproducing to the present invention's permission limiting.
Figure 13 represents the in-built example of the audio reproducing control section 16d of present embodiment.For purposes of illustration, each that suppose three kinds of audio reproducing control section 16d recited above protection control methods all is used, although only adopt wherein a kind of in practice.This circuit comprises that reception can be controlled as from the wave digital lowpass filter 61 of the dateout sampling of subrane built-up section 16c, one through incoming line 60 and keeps and the sampling and the holding circuit 62 of each data sampling of output on specific interval, low level to each audio data samples is carried out control recited above so that control the extent control part 63 of the intensity grade that each sampling can represent, memory 64 that is used for temporarily keeping the continuous data sampling and one are used for digital audio-frequency data is transformed to the digital-to-analog converter 65 of simulated audio signal.Extent control part 63 is by protection control signal control, with basis be the definite final protection class of voice data by the low level of the variable number of each 16 audio data samples being changed to a fixed value recited above, different degree levels is provided.
As shown, the protection control signal also can be applied to control sampling and holding circuit 62, and is above-described by sampling that utilizes audio data samples and the reproduction guard method that keeps processing to realize.Similarly, the protection control signal can be applied to control LPF61, to obtain to reproduce protection control by changing audio signal bandwidth.This is clearly, if only use a kind of of top three kinds of protection control methods, can use than the simpler a kind of circuit of circuit shown in Figure 13.
In the above in the various execution modes of Miao Shuing; thereby between the combination of the protection class that protection class that the usable medium protected data is represented and available devices protected data are represented and available corresponding final protection class, there is a kind of fixing relation schema; promptly be stored in the relation schema in the matrix ROM of final protection class determining section 13, its example is represented in Fig. 2.But, may need in some cases from a plurality of different relation schemas, to select a relation schema with the severe degree of unequal loss protection.Particularly, it can may be favourable by the switch of people's operation of being responsible for this reproducer that reproducer is provided with one, and this switch can be used for selecting from a plurality of different relation schemas like this, and the people is definite neatly thus thereby reproduce degree of protection.By this way, the people who is responsible for this reproducer can to guarantee to reproduce protection be suitable for the beholder.For example, an adult can be provided with switch, thereby guarantees that unfavorable scene can not seen by the children of any this reproducer of use.In this case, for example the least severe relation schema of hypothesis is the relation schema shown in Fig. 2, and the gamut of possible relation schema is illustrated in the table of Figure 14.Like this; combination for each protection class that obtains from media protection data and equipment protection data; exist the corresponding scope of one or more probable values of final protection class, this scope extends to the severeest value (being protection class E) from least severe value.A method that realizes this ability can provide a plurality of matrix ROM (the perhaps a plurality of independent matrix districts of definition in a ROM), is used to store each different relation schema.But will describe an embodiment of the invention now, utilize the arbitrary execution mode in the embodiments of the present invention that it had described above passing through to revise simply, can easily obtain this ability.
This execution mode is presented among Figure 15, and it is a kind of remodeling of Fig. 5 execution mode.This execution mode and Fig. 5 execution mode different are to have equipped a severe degree correction circuit 30 and a severe degree correction is provided with switch 31.Should be connected between final protection class determining section 13 and the protection control signal generating portion 14a by severe degree correction circuit 30; act as and optionally revise each protection class value (as the top explanation of being done for Fig. 5 execution mode) of reading in the matrix ROM of final protection class determining section 13, and result's revised final protection class is offered protection control signal generating portion 14a.Severe degree correction is provided with switch 31 and can be adjusted by the people who is responsible for CD player, will use P respectively from five ATo P BSelect a position in the possible position of the switch of sign.Severe degree correction is provided with switch 31 and is connected to control severe degree correction circuit 30, makes severe degree correction circuit 30, as hereinafter narrating, and the ad-hoc location execute protection grade correction that is set up according to switch.
Expression among the figure in Figure 16 (A) to (D); for each value in four probable values (being determined by equipment protection signal generating portion 12) of equipment protection grade, five probable values of media protection grade (as described above definite by media protection input part 11) and severe degree correction are provided with five position P of switch 31 ATo P EBetween relation.Reference diagram (A) at first is if the position of the switch is P A, then relation between media protection grade point, equipment protection grade point and the final protection class value and the value that obtains from the respective column of Fig. 2 remain unchanged; The setting that promptly should severe degree correction switch 31 be set provides the minimum severe degree of reproduction protection.If the position of the switch is located at P B, the desirable minimum severe value of then revised final protection class becomes grade B.In other words, if final protection class determining section 13 is determined a protection class A, it is sternly spent correction circuit 30 and is changed over revised final protection class B.If the position of the switch is P C, then the minimum severe value of revised final protection class changes over C.If the position of the switch is P D, then the minimum severe value of revised final protection class changes over D, and if the position of the switch is P E, then revise the final protection class in back and be fixed to E.
For equipment protection grade point 2,3 and 4 same so, as the figure among Figure 16 (B), (C) with (D), the secondary series, the 3rd that they correspond respectively among Fig. 2 is listed as and the 4th row.
Clearly, utilize a logical circuit can easily constitute severe degree correction circuit 30, it carries out a kind of simple algorithm according to the position that severe degree correction is provided with switch 31, and promptly this algorithm may begin like this:
If (severe degree is revised switch 31 and is arranged on P A, the protection class value of being set up by final protection class determining section 13 is directly sent to protection control signal generating portion 14a, as final protection class.
If severe degree is revised switch 31 and is arranged on P B, and if the protection class value of being established by final protection class determining section 13 is grade A, it changed into grade B and send protection control signal generating portion 14a to, as (revised) final protection class.In other cases, transmit the protection class value that produces by final protection class determining section 13 invariably, as final protection class.
If severe degree is revised switch 31 and is arranged on P C, and if the protection class of being established by final protection class determining section 13 is grade A or grade B, changes into grade C, and sends protection control signal generating portion 14a to, as final protection class.In other cases, transmit the protection class of establishing by final protection class determining section 13 invariably, as final protection class ...), and or the like.
By this execution mode,, severe degree correction is set to its minimum severe position (P like this if being provided with switch 31 A), then the relation schema between the combination of media protection grade and reproducer protection class value will be as shown in Figure 2.If severe degree correction is provided with switch 31 and is set to maximum severe position (P E), then relation schema will be such, promptly final protection class will always be highest, i.e. grade E.When severe degree correction is provided with switch 31 continuously from position P AChange to P EThe time, the minimum severe degree (in the scope of the possible limited degree that can be set by final protection class) that reproduces restriction through consecutive steps increases to bigger severe degree.
If for example the equipment protection grade is 2 and the media protection grade is 4, then final protection class will be B.But by changing the position that severe degree correction is provided with switch 31, the user can change to higher value in the scope of B to E to final protection class.Like this by this execution mode, although can be by the manufacturer of recording medium or copyright owner with by the maker and seller regulation protection class value of reproducer, final degree of protection can be determined by the people of responsible this reproducer.This characteristic is very useful.
As from understandable the top description to each execution mode; the present invention allows to determine last protection class; this final protection class can be used to control the video that write down or send or the reproduction of audio signal; this final protection class is based on that the combination of protection class determines; protection class respectively each freedom the manufacturer of tracer signal or copyright owner (or be sent out the broadcaster of signal, or be sent out the copyright owner of signal) and the maker or seller of reproducer are definite.Final protection class can be employed, and reaching point-device reproduction protection, thereby the specific region for example in the particular frame group of vision signal and/or the frame all can be protected by restrict reproduction, and the degree of restriction is to change by mode progressively.The present invention simultaneously can provide corresponding protection to the audio signal that produces together with vision signal.
Although the present invention is in the above with reference to the CD player description of equipment; be appreciated that in office where face all is not limited to this equipment in the present invention, the present invention that puts it briefly can be applicable to the reproduction protection of the equipment that is used for reproducing the video and/or audio signal that has write down or be sent out of any kind.

Claims (15)

1. one kind is reproduced guard method, comprising:
The media protection data are attached on the master data, and transmit described data protection data and master data by described data medium, wherein the media protection data are confirmed as a grade corresponding to specific data medium and definite a plurality of predetermined media protection grades;
By described data medium described master data and media protection data are offered a reproducer;
In described reproducer, produce the equipment protection data, wherein the equipment protection data are confirmed as a grade corresponding to described reproducer and definite a plurality of premise equipment protection class;
Determine a protection class based on the combination of media protection data and equipment protection data; And
According to described protection class, control described reproducer by limiting described reproduction, carrying out the reproduction of described master data, thereby reproduce fully, part reproduces and also or not reproduce described master data.
2. one kind provides the reproducer that reproduces protection; be used to operate the master data and the operation media protection data that transmit by a data medium; wherein the media protection data are confirmed as corresponding to described data medium and determine grade of a plurality of predetermined media protection grades and transmitted by described data medium that this equipment comprises:
Be used to produce the device of equipment protection data, wherein the equipment protection data are confirmed as a grade corresponding to described reproducer and definite a plurality of premise equipment protection class;
Be used for combination, the device of a protection class of definition based on described media protection data and described equipment protection data; And
Be used to carry out the device of the reproduction of described master data, comprise the device that is used for limiting in a predefined manner described reproduction, thereby reproduce fully, part reproduces and also or not reproduce described master data according to described protection class.
3. according to the reproducer of claim 2; wherein said master data is transmitted by described data medium after compression and coding; wherein said reproducer comprises code translator (15a, 15b, 15c) and the device of the described master data that decompresses, and wherein saidly is used to limit device that master data reproduces and comprises the device of controlling at least one device among described code translator and the described decompressing device according to described protection class.
4. according to the reproducer of claim 2, wherein said master data comprises video data, at the video data that applies by the pixel value that each frame internal fixation size of vision signal is determined after thereby map function obtains compressing, transmit by described data medium, wherein said decompressing device comprises the device (15c) that applies inverse transformation operation, and the device that reproduces of wherein said restriction master data is used for optionally cancelling specific a part of coefficient of carrying out in a plurality of conversion coefficients that described inverse transformation operation adopted.
5. according to the reproducer of claim 2; wherein said master data is transmitted by described data medium after being compressed, quantizing and encoding; wherein said reproducer comprises the device (15b) that takes off the described master data of quantification, and the device that wherein said restriction master data is reproduced comprises according to the described device that takes off quantization device of described protection class control.
6. according to the reproducer of claim 2, the device that wherein said restriction master data is reproduced comprises the device (52,62) of the selected part of periodically cancelling the described master data of being used by described playback control device in reproducing described master data.
7. according to the reproducer of claim 6, wherein each described selected part comprises at least one numerical data sampling.
8. according to the reproducer of claim 6, wherein said master data sheet registration word vision signal, and also wherein each described selected part comprises at least one video signal frame.
9. according to the reproducer of claim 2, the device that wherein said restriction master data is reproduced comprises the extent control device (51,63) that optionally changes some the signal amplitude degree that can be represented by each data sampling of described master data.
10. according to the reproducer of claim 2, the device that wherein said restriction master data is reproduced comprises the controlled digital low-pass filtering device (61) that is used for described master data is carried out filtering, thereby controllably changes from the bandwidth of the reproduction master data of described equipment acquisition.
11. reproducer according to claim 2; wherein said media protection data regulation media protection grade and protective position information; and a part of the described master data of wherein said protective position information specifies, this part is subjected to the reproduction restriction according to described protection class.
12. according to the reproducer of claim 11, wherein said master data comprises digital video signal, and at least one zone in each frame of a plurality of frames of the described vision signal of wherein said protective position information specifies.
13. reproducer according to claim 2; also comprise the severe degree of protection correcting device; it can be carried out according to the described combination of media protection data and equipment protection data and definite described protection class is revised, to obtain a revised protection class.
14. reproducer according to claim 13; wherein said severe degree correcting device comprises the manned switch (31) and the severe degree correction circuit device (30) that are installed on the described reproducer; severe degree correction circuit device (30) and described switch are coupled and are connected to the signal that can receive a described protection class of expression; be used for according to described switch the described protection class of position correction is set, thereby produce the output signal that the back protection class is revised in an expression.
15. reproducer according to claim 14; wherein said protection class has a value; a degree of restriction in the degree of restriction is reproduced in a plurality of continuous increase of the described master data that this value defined distributes between minimum and maximum limit system, and wherein said severe degree correcting device responds described switch and the change of position is set only to change described irreducible minimum system.
CN95102295A 1994-02-22 1995-02-22 Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction Expired - Lifetime CN1066892C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP47762/1994 1994-02-22
JP6047762A JP2853727B2 (en) 1994-02-22 1994-02-22 Reproduction protection method and protection reproduction device
JP47762/94 1994-02-22

Publications (2)

Publication Number Publication Date
CN1116803A CN1116803A (en) 1996-02-14
CN1066892C true CN1066892C (en) 2001-06-06

Family

ID=12784390

Family Applications (1)

Application Number Title Priority Date Filing Date
CN95102295A Expired - Lifetime CN1066892C (en) 1994-02-22 1995-02-22 Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction

Country Status (6)

Country Link
US (41) US6212329B1 (en)
EP (1) EP0668695B1 (en)
JP (1) JP2853727B2 (en)
KR (1) KR100201232B1 (en)
CN (1) CN1066892C (en)
DE (1) DE69516326T2 (en)

Families Citing this family (161)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020048448A1 (en) * 1993-03-29 2002-04-25 Microsoft Corporation Pausing the display of a television program as a signal including the television program is received
US6963859B2 (en) 1994-11-23 2005-11-08 Contentguard Holdings, Inc. Content rendering repository
US7117180B1 (en) 1994-11-23 2006-10-03 Contentguard Holdings, Inc. System for controlling the use of digital works using removable content repositories
JPH08263438A (en) 1994-11-23 1996-10-11 Xerox Corp Distribution and use control system of digital work and access control method to digital work
US6865551B1 (en) 1994-11-23 2005-03-08 Contentguard Holdings, Inc. Removable content repositories
US7165174B1 (en) 1995-02-13 2007-01-16 Intertrust Technologies Corp. Trusted infrastructure support systems, methods and techniques for secure electronic commerce transaction and rights management
US6948070B1 (en) 1995-02-13 2005-09-20 Intertrust Technologies Corporation Systems and methods for secure transaction management and electronic rights protection
US7133846B1 (en) 1995-02-13 2006-11-07 Intertrust Technologies Corp. Digital certificate support system, methods and techniques for secure electronic commerce transaction and rights management
US7143290B1 (en) 1995-02-13 2006-11-28 Intertrust Technologies Corporation Trusted and secure techniques, systems and methods for item delivery and execution
US7069451B1 (en) 1995-02-13 2006-06-27 Intertrust Technologies Corp. Systems and methods for secure transaction management and electronic rights protection
US6658568B1 (en) 1995-02-13 2003-12-02 Intertrust Technologies Corporation Trusted infrastructure support system, methods and techniques for secure electronic commerce transaction and rights management
US7124302B2 (en) 1995-02-13 2006-10-17 Intertrust Technologies Corp. Systems and methods for secure transaction management and electronic rights protection
US6157721A (en) 1996-08-12 2000-12-05 Intertrust Technologies Corp. Systems and methods using cryptography to protect secure computing environments
US5892900A (en) 1996-08-30 1999-04-06 Intertrust Technologies Corp. Systems and methods for secure transaction management and electronic rights protection
US5943422A (en) 1996-08-12 1999-08-24 Intertrust Technologies Corp. Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels
US7133845B1 (en) 1995-02-13 2006-11-07 Intertrust Technologies Corp. System and methods for secure transaction management and electronic rights protection
ATE419586T1 (en) 1995-02-13 2009-01-15 Intertrust Tech Corp SYSTEMS AND PROCEDURES FOR SECURE TRANSACTION MANAGEMENT AND ELECTRONIC LEGAL PROTECTION
US7095854B1 (en) 1995-02-13 2006-08-22 Intertrust Technologies Corp. Systems and methods for secure transaction management and electronic rights protection
JPH08287603A (en) * 1995-04-13 1996-11-01 Pioneer Electron Corp Information recorder and information reproducing device
US5813010A (en) * 1995-04-14 1998-09-22 Kabushiki Kaisha Toshiba Information storage and information transmission media with parental control
US6009433A (en) * 1995-04-14 1999-12-28 Kabushiki Kaisha Toshiba Information storage and information transmission media with parental control
JPH0917127A (en) * 1995-06-30 1997-01-17 Pioneer Electron Corp Medium recording method, and apparatus and medium reproducing apparatus
JPH09161375A (en) * 1995-12-07 1997-06-20 Sony Corp Disc playback device
US20020044757A1 (en) * 1995-08-04 2002-04-18 Sony Corporation Information carrier, device for reading and device for providing the information carrier and method of transmitting picture information
JP2797033B2 (en) * 1995-08-21 1998-09-17 松下電器産業株式会社 Optical disc reproducing apparatus and reproducing method
CA2206456C (en) * 1995-10-09 1999-09-28 Matsushita Electric Industrial Co., Ltd. Multimedia optical disc which conforms to the motion picture rating systems in a variety of countries and a reproducing device for said disc
EP0769780B1 (en) * 1995-10-18 2003-01-29 Matsushita Electric Industrial Co., Ltd. Information recording device and information output device
JP3176030B2 (en) * 1996-01-08 2001-06-11 株式会社東芝 Copy control method and copy control device
JP3796795B2 (en) * 1996-02-22 2006-07-12 ソニー株式会社 Image display system
US20010011253A1 (en) 1998-08-04 2001-08-02 Christopher D. Coley Automated system for management of licensed software
JP3816571B2 (en) * 1996-03-15 2006-08-30 パイオニア株式会社 Information recording apparatus, information recording method, information reproducing apparatus, and information reproducing method
JP4059355B2 (en) * 1996-04-04 2008-03-12 パイオニア株式会社 Information recording apparatus, information recording method, information reproducing apparatus, and information reproducing method
EP1621961A3 (en) * 1996-05-15 2009-01-21 Intertrust Technologies Corp Storage media electronic rights management
JPH103745A (en) * 1996-06-12 1998-01-06 Sony Corp Recording medium, digital copy management method, playback device, and recording device
US20020001448A1 (en) * 1996-07-10 2002-01-03 Lg Electronics, Inc. Selective recording and reproduction of video programs according to video programs according to video program grading
TW412734B (en) * 1996-12-26 2000-11-21 Toshiba Corp Storage medium for recording data, regeneration device for regenerating data recorded in the storage medium, and regeneration system for regenerating data recorded in the storage medium via network
US7062500B1 (en) 1997-02-25 2006-06-13 Intertrust Technologies Corp. Techniques for defining, using and manipulating rights management data structures
US6233684B1 (en) 1997-02-28 2001-05-15 Contenaguard Holdings, Inc. System for controlling the distribution and use of rendered digital works through watermaking
ATE199990T1 (en) * 1997-08-28 2001-04-15 Sony Dadc Austria Ag SYSTEM FOR COPY MANAGEMENT OF AN OPTICAL DISK
WO1999023657A1 (en) * 1997-10-31 1999-05-14 Sony Corporation Information encoding device and method, information decoding device and method, recording medium, and provided medium
US7092914B1 (en) 1997-11-06 2006-08-15 Intertrust Technologies Corporation Methods for matching, selecting, narrowcasting, and/or classifying based on rights management and/or other information
US6526218B1 (en) * 1998-01-26 2003-02-25 Canon Kabushiki Kaisha Editing-function-integrated reproducing apparatus
WO1999042996A1 (en) * 1998-02-19 1999-08-26 Sony Corporation Recorder / reproducer, recording / reproducing method, and data processor
US7233948B1 (en) 1998-03-16 2007-06-19 Intertrust Technologies Corp. Methods and apparatus for persistent control and protection of content
JP3890737B2 (en) * 1998-04-14 2007-03-07 株式会社日立製作所 Apparatus and method for reproducing digital video signal or audio signal
JP3383580B2 (en) * 1998-05-15 2003-03-04 株式会社東芝 Information storage medium, information recording / reproducing apparatus and method
US6298446B1 (en) * 1998-06-14 2001-10-02 Alchemedia Ltd. Method and system for copyright protection of digital images transmitted over networks
US6385388B1 (en) * 1998-07-20 2002-05-07 Thomson Licensing S.A. Digital video apparatus user interface
US7346580B2 (en) * 1998-08-13 2008-03-18 International Business Machines Corporation Method and system of preventing unauthorized rerecording of multimedia content
US7962413B2 (en) 1998-08-13 2011-06-14 International Business Machines Corporation End-user system of preventing unauthorized rerecording of multimedia content
US7383228B2 (en) 1998-08-13 2008-06-03 International Business Machines Corporation Method and system for preventing unauthorized rerecording of multimedia content
JP2000069415A (en) 1998-08-18 2000-03-03 Fujitsu Ltd Image control circuit, image control method, or computer-readable medium storing a program for causing a computer system to execute the image control method
EP1066633B1 (en) * 1998-10-08 2009-01-28 Panasonic Corporation Device and method for reproducing data
US7068787B1 (en) 1998-10-23 2006-06-27 Contentguard Holdings, Inc. System and method for protection of digital works
US6865552B1 (en) * 1998-12-02 2005-03-08 Matsushita Electric Industrial Co., Ltd. Data copying system, data copying apparatus, data copying method, and recording medium
DE69932695T2 (en) 1998-12-11 2007-09-13 Sony Corp. Technology for data copy control
JP2000260121A (en) 1999-03-05 2000-09-22 Toshiba Corp Information reproducing device and information recording device
JP4356178B2 (en) * 1999-03-09 2009-11-04 ソニー株式会社 Playback device
US7797550B2 (en) * 2002-09-25 2010-09-14 Broadcom Corporation System and method for securely buffering content
US7549056B2 (en) 1999-03-19 2009-06-16 Broadcom Corporation System and method for processing and protecting content
US7356688B1 (en) 1999-04-06 2008-04-08 Contentguard Holdings, Inc. System and method for document distribution
US7286665B1 (en) 1999-04-06 2007-10-23 Contentguard Holdings, Inc. System and method for transferring the right to decode messages
US6937726B1 (en) 1999-04-06 2005-08-30 Contentguard Holdings, Inc. System and method for protecting data files by periodically refreshing a decryption key
US6859533B1 (en) 1999-04-06 2005-02-22 Contentguard Holdings, Inc. System and method for transferring the right to decode messages in a symmetric encoding scheme
KR100608268B1 (en) * 1999-04-21 2006-08-02 삼성전자주식회사 Method and apparatus for protecting copyright of digital recording media, and the digital recording media
US7430670B1 (en) 1999-07-29 2008-09-30 Intertrust Technologies Corp. Software self-defense systems and methods
US7243236B1 (en) 1999-07-29 2007-07-10 Intertrust Technologies Corp. Systems and methods for using cryptography to protect secure and insecure computing environments
US8656423B2 (en) * 1999-08-27 2014-02-18 Ochoa Optics Llc Video distribution system
US6647417B1 (en) 2000-02-10 2003-11-11 World Theatre, Inc. Music distribution systems
US7209900B2 (en) * 1999-08-27 2007-04-24 Charles Eric Hunter Music distribution systems
US8090619B1 (en) 1999-08-27 2012-01-03 Ochoa Optics Llc Method and system for music distribution
US6952685B1 (en) 1999-08-27 2005-10-04 Ochoa Optics Llc Music distribution system and associated antipiracy protection
US20030133692A1 (en) * 1999-08-27 2003-07-17 Charles Eric Hunter Video distribution system
US7370016B1 (en) 1999-08-27 2008-05-06 Ochoa Optics Llc Music distribution systems
US7647618B1 (en) 1999-08-27 2010-01-12 Charles Eric Hunter Video distribution system
US20020056118A1 (en) * 1999-08-27 2002-05-09 Hunter Charles Eric Video and music distribution system
US6885748B1 (en) 1999-10-23 2005-04-26 Contentguard Holdings, Inc. System and method for protection of digital works
JP3405306B2 (en) 1999-11-26 2003-05-12 日本ビクター株式会社 Information transmission method, information transmission device, reproducing device, receiving device, and recording medium
US9252898B2 (en) 2000-01-28 2016-02-02 Zarbaña Digital Fund Llc Music distribution systems
JP2001309372A (en) * 2000-04-17 2001-11-02 Mitsubishi Electric Corp Encoding device
JP2001351319A (en) * 2000-06-06 2001-12-21 Pioneer Electronic Corp Copyright protection method, reproduction method, reproducer, recording method and recorder
US20020150246A1 (en) * 2000-06-28 2002-10-17 Akira Ogino Additional information embedding device and additional information embedding method
NL1015587C2 (en) * 2000-07-03 2002-01-04 Johannes Henricus Mari Heijden Information carrier, in particular music carrier.
US6931545B1 (en) 2000-08-28 2005-08-16 Contentguard Holdings, Inc. Systems and methods for integrity certification and verification of content consumption environments
US7743259B2 (en) 2000-08-28 2010-06-22 Contentguard Holdings, Inc. System and method for digital rights management using a standard rendering engine
US7913095B2 (en) 2000-08-28 2011-03-22 Contentguard Holdings, Inc. Method and apparatus for providing a specific user interface in a system for managing content
US7343324B2 (en) 2000-11-03 2008-03-11 Contentguard Holdings Inc. Method, system, and computer readable medium for automatically publishing content
US6912294B2 (en) 2000-12-29 2005-06-28 Contentguard Holdings, Inc. Multi-stage watermarking process and system
JP4752113B2 (en) * 2001-01-16 2011-08-17 ソニー株式会社 Electronic device and signal transmission method
US6754642B2 (en) 2001-05-31 2004-06-22 Contentguard Holdings, Inc. Method and apparatus for dynamically assigning usage rights to digital works
US8069116B2 (en) 2001-01-17 2011-11-29 Contentguard Holdings, Inc. System and method for supplying and managing usage rights associated with an item repository
US7206765B2 (en) 2001-01-17 2007-04-17 Contentguard Holdings, Inc. System and method for supplying and managing usage rights based on rules
US7028009B2 (en) 2001-01-17 2006-04-11 Contentguardiholdings, Inc. Method and apparatus for distributing enforceable property rights
US7774279B2 (en) 2001-05-31 2010-08-10 Contentguard Holdings, Inc. Rights offering and granting
AU2002234254B2 (en) 2001-01-17 2005-04-21 Contentguard Holdings, Inc. Method and apparatus for managing digital content usage rights
US8112311B2 (en) * 2001-02-12 2012-02-07 Ochoa Optics Llc Systems and methods for distribution of entertainment and advertising content
US20030061607A1 (en) * 2001-02-12 2003-03-27 Hunter Charles Eric Systems and methods for providing consumers with entertainment content and associated periodically updated advertising
JP4957936B2 (en) * 2001-03-16 2012-06-20 ソニー株式会社 Content signal reproducing apparatus and content signal reproducing method
EP1942392A1 (en) * 2001-03-28 2008-07-09 Macrovision Corporation Method, apparatus and optical medium for enabling playback of encrypted digital video on a plurality of playback devices having different security characteristics
US20020141582A1 (en) 2001-03-28 2002-10-03 Kocher Paul C. Content security layer providing long-term renewable security
US7987510B2 (en) 2001-03-28 2011-07-26 Rovi Solutions Corporation Self-protecting digital content
US6876984B2 (en) 2001-05-31 2005-04-05 Contentguard Holdings, Inc. Method and apparatus for establishing usage rights for digital content to be created in the future
US8275709B2 (en) 2001-05-31 2012-09-25 Contentguard Holdings, Inc. Digital rights management of content when content is a future live event
US6976009B2 (en) 2001-05-31 2005-12-13 Contentguard Holdings, Inc. Method and apparatus for assigning consequential rights to documents and documents having such rights
US6895503B2 (en) 2001-05-31 2005-05-17 Contentguard Holdings, Inc. Method and apparatus for hierarchical assignment of rights to documents and documents having such rights
US6973445B2 (en) 2001-05-31 2005-12-06 Contentguard Holdings, Inc. Demarcated digital content and method for creating and processing demarcated digital works
US8099364B2 (en) 2001-05-31 2012-01-17 Contentguard Holdings, Inc. Digital rights management of content when content is a future live event
US8275716B2 (en) 2001-05-31 2012-09-25 Contentguard Holdings, Inc. Method and system for subscription digital rights management
US7725401B2 (en) 2001-05-31 2010-05-25 Contentguard Holdings, Inc. Method and apparatus for establishing usage rights for digital content to be created in the future
US7222104B2 (en) 2001-05-31 2007-05-22 Contentguard Holdings, Inc. Method and apparatus for transferring usage rights and digital work having transferrable usage rights
US7152046B2 (en) 2001-05-31 2006-12-19 Contentguard Holdings, Inc. Method and apparatus for tracking status of resource in a system for managing use of the resources
US8001053B2 (en) 2001-05-31 2011-08-16 Contentguard Holdings, Inc. System and method for rights offering and granting using shared state variables
EP1340134A4 (en) 2001-06-07 2004-07-28 Contentguard Holdings Inc Method and apparatus for supporting multiple trust zones in a digital rights management system
US7774280B2 (en) 2001-06-07 2010-08-10 Contentguard Holdings, Inc. System and method for managing transfer of rights using shared state variables
AU2002345577A1 (en) 2001-06-07 2002-12-23 Contentguard Holdings, Inc. Protected content distribution system
JP3880338B2 (en) * 2001-07-04 2007-02-14 キヤノン株式会社 Data processing apparatus, data processing method, computer-readable recording medium, and data processing program
US7960005B2 (en) 2001-09-14 2011-06-14 Ochoa Optics Llc Broadcast distribution of content for storage on hardware protected optical storage media
DE10164135A1 (en) * 2001-12-30 2003-07-17 Juergen K Lang Multimedia protection system divides data for part encryption with variable length key
DE10164131A1 (en) * 2001-12-30 2003-07-17 Juergen K Lang Cryptographic module for the storage and playback of copy and usage protected electronic audio and video media
DE10164133A1 (en) * 2001-12-30 2003-07-17 Juergen K Lang System for storing and reproducing copyright-/use-protected electronic sound/image media in a receiver encodes data for electronic media subject to cryptographic processes.
DE10164134A1 (en) * 2001-12-30 2003-07-17 Juergen K Lang System for preparing and distributing copyright-protected electronic media in a receiver, involves encoding data for reproduction after applying cryptographic processes.
US7630569B2 (en) 2002-02-26 2009-12-08 Decegama Angel Real-time software video/audio transmission and display with content protection against camcorder piracy
TWI280755B (en) * 2002-04-15 2007-05-01 Interdigital Tech Corp Wireless user equipments
EP1550127A1 (en) * 2002-09-30 2005-07-06 Koninklijke Philips Electronics N.V. Record carrier with multiple coupling elements
CN1711787B (en) 2002-11-05 2013-04-24 艾利森电话股份有限公司 Collective notification of node reset to subset of connections in radio access network
JP4003628B2 (en) * 2002-12-02 2007-11-07 ソニー株式会社 Image encoding apparatus and method, and program
US7370212B2 (en) 2003-02-25 2008-05-06 Microsoft Corporation Issuing a publisher use license off-line in a digital rights management (DRM) system
EP1602105A1 (en) * 2003-03-04 2005-12-07 Koninklijke Philips Electronics N.V. Limiting distribution of copy-protected material to geographic regions
AP2005003476A0 (en) 2003-06-05 2005-12-31 Intertrust Tech Corp Interoperable systems and methods for peer-to-peerservice orchestration.
KR101081729B1 (en) 2003-07-07 2011-11-08 로비 솔루션스 코포레이션 Reprogrammable security for controlling piracy and enabling interactive content
US7570672B2 (en) * 2004-02-02 2009-08-04 Simplexgrinnell Lp Fiber optic multiplex modem
WO2005093543A1 (en) * 2004-03-23 2005-10-06 Koninklijke Philips Electronics N.V. Computer network access control system
KR100678018B1 (en) * 2005-01-07 2007-02-02 엘지전자 주식회사 Recording and playback method and device according to the set audience rating
CA2592448C (en) * 2005-01-26 2013-01-15 Kenneth Kerpez Capacity management system for passive optical networks
US8009188B2 (en) 2005-02-28 2011-08-30 Victor Company Of Japan, Ltd. Video data processing apparatus utilizing viewer influence, picture reproducing apparatus, and computer programs related thereto
JP2006262191A (en) * 2005-03-17 2006-09-28 Victor Co Of Japan Ltd Multiple viewpoint solid image display method, multiple viewpoint solid image display unit and multiple viewpoint solid image display program
US8438645B2 (en) 2005-04-27 2013-05-07 Microsoft Corporation Secure clock with grace periods
US8725646B2 (en) 2005-04-15 2014-05-13 Microsoft Corporation Output protection levels
JP4513645B2 (en) * 2005-05-13 2010-07-28 日本ビクター株式会社 Multi-view video display method, multi-view video display device, and multi-view video display program
KR20060120396A (en) * 2005-05-20 2006-11-27 엘지전자 주식회사 Recording media, data reproducing method and reproducing apparatus
US20060265758A1 (en) * 2005-05-20 2006-11-23 Microsoft Corporation Extensible media rights
US7814022B2 (en) * 2005-06-10 2010-10-12 Aniruddha Gupte Enhanced media method and apparatus for use in digital distribution system
US8219493B2 (en) * 2005-06-10 2012-07-10 Aniruddha Gupte Messaging method and apparatus for use in digital distribution systems
US7567671B2 (en) * 2005-06-10 2009-07-28 Aniruddha Gupte Encryption method and apparatus for use in digital distribution system
US8341527B2 (en) * 2005-06-10 2012-12-25 Aniruddha Gupte File format method and apparatus for use in digital distribution system
US8676711B2 (en) * 2005-06-10 2014-03-18 Aniruddha Gupte Payment method and apparatus for use in digital distribution system
US9626667B2 (en) 2005-10-18 2017-04-18 Intertrust Technologies Corporation Digital rights management engine systems and methods
JP4844365B2 (en) * 2005-12-28 2011-12-28 ソニー株式会社 Information communication terminal, information communication method, recording medium, and information communication system
US20090041311A1 (en) * 2007-08-09 2009-02-12 Jon Hundley Facial recognition based content blocking system
US10087330B2 (en) * 2008-02-19 2018-10-02 Cabot Corporation Mesoporous carbon black and processes for making same
US9017837B2 (en) * 2008-02-19 2015-04-28 Cabot Corporation High surface area graphitized carbon and processes for making same
KR101612442B1 (en) * 2008-05-13 2016-04-15 삼성전자주식회사 Method and apparatus for providing and using Content Advisory for Internet contents
WO2010102297A2 (en) * 2009-03-06 2010-09-10 Parker Anthony A Protein-containing foams, manufacture and use thereof
US8717857B2 (en) 2009-05-20 2014-05-06 Sony Dadc Austria Ag Method for copy protection
EP2254121A1 (en) * 2009-05-20 2010-11-24 Sony DADC Austria AG Method for copy protection
US9263085B2 (en) 2009-05-20 2016-02-16 Sony Dadc Austria Ag Method for copy protection
JP5590390B2 (en) * 2010-07-15 2014-09-17 ソニー株式会社 Image processing apparatus and method
EP2518719B1 (en) 2011-04-08 2016-05-18 Dolby Laboratories Licensing Corporation Image range expansion control methods and apparatus
AU2012242895B2 (en) 2011-04-11 2015-07-02 Intertrust Technologies Corporation Information security systems and methods
WO2013109787A1 (en) 2012-01-17 2013-07-25 Laine Richard M Glycoxy silanes as a source of silica and silicate precipitates
US9979684B2 (en) 2016-07-13 2018-05-22 At&T Intellectual Property I, L.P. Apparatus and method for managing sharing of content

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580367A2 (en) * 1992-07-24 1994-01-26 Sony Corporation Video signal transmission, recording and reproduction

Family Cites Families (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1183950A (en) * 1980-09-26 1985-03-12 Bo Lofberg Method for processing an information signal and means for carrying out the method
DE3314783C2 (en) * 1983-04-23 1985-07-18 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Video recorder with automatic recording of parameters from the cassette
US5036537A (en) * 1984-11-19 1991-07-30 General Instrument Corp. Geographic black-out method for direct broadcast satellite system
US4685131A (en) * 1985-03-11 1987-08-04 General Instrument Corp. Program blocking method for use in direct broadcast satellite system
IL74801A (en) 1985-04-03 1989-06-30 Zalman Zaharia Foldable framework and portable objects having such a framework
US4930158A (en) * 1987-09-02 1990-05-29 Vogel Peter S Selective video playing system
US5321750A (en) * 1989-02-07 1994-06-14 Market Data Corporation Restricted information distribution system apparatus and methods
US5191611A (en) * 1989-04-03 1993-03-02 Lang Gerald S Method and apparatus for protecting material on storage media and for transferring material on storage media to various recipients
WO1990013118A1 (en) * 1989-04-14 1990-11-01 Kilbel Joseph J Video cassette recorder protection system
US5214556A (en) * 1989-04-14 1993-05-25 Kilbel Joseph J Video cassette recorder protection system
DE4107734A1 (en) * 1991-03-11 1992-09-17 Grundig Emv VIDEO RECORDER WITH A MEMORY FOR STORING THE CONTENTS OF A VARIETY OF MAGNETIC TAPE CASSETTES
FR2681489B1 (en) 1991-09-17 1993-12-10 Matra Communication TIME DIVISION MULTIPLE ACCESS COMMUNICATION INSTALLATION STATION.
JPH05158531A (en) 1991-12-05 1993-06-25 Hitachi Ltd Method and device for confirming soundness of safety protective system of system
US5434623A (en) * 1991-12-20 1995-07-18 Ampex Corporation Method and apparatus for image data compression using combined luminance/chrominance coding
JP3337232B2 (en) * 1991-12-26 2002-10-21 東レ・ダウコーニング・シリコーン株式会社 Method for producing powder mixture comprising cured silicone fine particles and inorganic fine particles
JP2942837B2 (en) * 1992-01-31 1999-08-30 株式会社セガ・エンタープライゼス Security check method, game device, and information storage medium used for them
US5434678A (en) * 1993-01-11 1995-07-18 Abecassis; Max Seamless transmission of non-sequential video segments
JP3061678B2 (en) 1992-03-10 2000-07-10 三菱電機株式会社 Disk recording and playback device
JP3128959B2 (en) 1992-06-16 2001-01-29 松下電器産業株式会社 Digital recording and playback device
JP3010930B2 (en) * 1992-09-24 2000-02-21 松下電器産業株式会社 Recording and playback device
US5315448A (en) * 1993-03-18 1994-05-24 Macrovision Corporation Copy protection for hybrid digital video tape recording and unprotected source material
US5431161A (en) * 1993-04-15 1995-07-11 Adac Laboratories Method and apparatus for information acquistion, processing, and display within a medical camera system
US5463565A (en) * 1993-10-29 1995-10-31 Time Warner Entertainment Co., L.P. Data block format for software carrier and player therefor
US5547164A (en) * 1994-12-28 1996-08-20 Ratnik Industries, Inc. Motorized water hydrant with manual override
US5682526A (en) * 1995-07-20 1997-10-28 Spacelabs Medical, Inc. Method and system for flexibly organizing, recording, and displaying medical patient care information using fields in a flowsheet
US5764226A (en) * 1995-12-29 1998-06-09 International Business Machine Corp. Reusable and modifiable data entry interface part
US5905496A (en) * 1996-07-03 1999-05-18 Sun Microsystems, Inc. Workflow product navigation system
US6055506A (en) * 1997-04-25 2000-04-25 Unitron Medical Communications, Inc. Outpatient care data system
US6128617A (en) * 1997-11-24 2000-10-03 Lowry Software, Incorporated Data display software with actions and links integrated with information
CA2233794C (en) * 1998-02-24 2001-02-06 Luc Bessette Method and apparatus for the management of medical files
US6504990B1 (en) * 1998-11-12 2003-01-07 Max Abecassis Randomly and continuously playing fragments of a video segment

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0580367A2 (en) * 1992-07-24 1994-01-26 Sony Corporation Video signal transmission, recording and reproduction

Also Published As

Publication number Publication date
US20090041131A1 (en) 2009-02-12
US6493382B2 (en) 2002-12-10
US20020034239A1 (en) 2002-03-21
US20020034237A1 (en) 2002-03-21
US6553067B2 (en) 2003-04-22
US20020034244A1 (en) 2002-03-21
US6212329B1 (en) 2001-04-03
US20020037040A1 (en) 2002-03-28
US20020034232A1 (en) 2002-03-21
US6542543B2 (en) 2003-04-01
US20020037041A1 (en) 2002-03-28
KR100201232B1 (en) 1999-06-15
US20020067767A1 (en) 2002-06-06
US6590935B2 (en) 2003-07-08
US6493383B2 (en) 2002-12-10
CN1116803A (en) 1996-02-14
US20020031174A1 (en) 2002-03-14
US20020031177A1 (en) 2002-03-14
US20020031171A1 (en) 2002-03-14
US20020037042A1 (en) 2002-03-28
US6498813B2 (en) 2002-12-24
USRE44099E1 (en) 2013-03-19
US20020037039A1 (en) 2002-03-28
DE69516326D1 (en) 2000-05-25
US6741647B2 (en) 2004-05-25
US8220016B2 (en) 2012-07-10
USRE42549E1 (en) 2011-07-12
US6570920B2 (en) 2003-05-27
US20020037044A1 (en) 2002-03-28
US6760375B2 (en) 2004-07-06
US20020031173A1 (en) 2002-03-14
US6954497B2 (en) 2005-10-11
US20020041627A1 (en) 2002-04-11
US6532261B2 (en) 2003-03-11
US20020034241A1 (en) 2002-03-21
US20020034230A1 (en) 2002-03-21
US6600782B2 (en) 2003-07-29
JP2853727B2 (en) 1999-02-03
US20020031175A1 (en) 2002-03-14
US6763065B2 (en) 2004-07-13
US20020034238A1 (en) 2002-03-21
US20020031172A1 (en) 2002-03-14
US6959039B2 (en) 2005-10-25
EP0668695A2 (en) 1995-08-23
US20020034240A1 (en) 2002-03-21
US20020034227A1 (en) 2002-03-21
US6963607B2 (en) 2005-11-08
US20020034236A1 (en) 2002-03-21
DE69516326T2 (en) 2001-01-04
US20020034231A1 (en) 2002-03-21
US6816549B2 (en) 2004-11-09
EP0668695A3 (en) 1996-04-24
US20020034233A1 (en) 2002-03-21
US6600781B2 (en) 2003-07-29
US6876700B2 (en) 2005-04-05
KR950025750A (en) 1995-09-18
US20020034229A1 (en) 2002-03-21
JPH07235131A (en) 1995-09-05
US6970505B2 (en) 2005-11-29
US6904090B2 (en) 2005-06-07
US6795500B2 (en) 2004-09-21
US6522692B2 (en) 2003-02-18
US20020034235A1 (en) 2002-03-21
US20020034242A1 (en) 2002-03-21
US6987806B2 (en) 2006-01-17
US6804296B2 (en) 2004-10-12
US20020034243A1 (en) 2002-03-21
US6804297B2 (en) 2004-10-12
US6483873B2 (en) 2002-11-19
US6487247B2 (en) 2002-11-26
US6823007B2 (en) 2004-11-23
US6985525B2 (en) 2006-01-10
US6466619B1 (en) 2002-10-15
US6804298B2 (en) 2004-10-12
US20090052525A1 (en) 2009-02-26
US20020034234A1 (en) 2002-03-21
US6539053B2 (en) 2003-03-25
US20010006534A1 (en) 2001-07-05
US20020037043A1 (en) 2002-03-28
US20090074381A1 (en) 2009-03-19
US6654415B2 (en) 2003-11-25
US7010031B2 (en) 2006-03-07
US6735251B2 (en) 2004-05-11
EP0668695B1 (en) 2000-04-19
US6763066B2 (en) 2004-07-13
US20020034226A1 (en) 2002-03-21
US20020034228A1 (en) 2002-03-21
US20020031176A1 (en) 2002-03-14

Similar Documents

Publication Publication Date Title
CN1066892C (en) Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction

Legal Events

Date Code Title Description
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: JVC KENWOOD CORPORATION

Free format text: FORMER OWNER: VICTORY CO. LTD.

Effective date: 20140306

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20140306

Address after: Kanagawa

Patentee after: JVC Kenwood Corp.

Address before: Japan Yokohama

Patentee before: Victory Co., Ltd.

EE01 Entry into force of recordation of patent licensing contract

Application publication date: 19960214

Assignee: Guangzhou Panyu Juda Car Audio Equipment Co., Ltd.

Assignor: Blue light United Co., Ltd.

Contract record no.: 2014990000233

Denomination of invention: Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction

Granted publication date: 20010606

License type: Common License

Record date: 20140422

Application publication date: 19960214

Assignee: Shenzhen Maxmade Technology Co.,Ltd.

Assignor: Blue light United Co., Ltd.

Contract record no.: 2014990000239

Denomination of invention: Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction

Granted publication date: 20010606

License type: Common License

Record date: 20140423

Application publication date: 19960214

Assignee: China Hualu Group Ltd.

Assignor: Blue light United Co., Ltd.

Contract record no.: 2014990000238

Denomination of invention: Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction

Granted publication date: 20010606

License type: Common License

Record date: 20140423

Application publication date: 19960214

Assignee: TCL Kone Electronics (Huizhou) Ltd.

Assignor: Blue light United Co., Ltd.

Contract record no.: 2014990000240

Denomination of invention: Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction

Granted publication date: 20010606

License type: Common License

Record date: 20140423

Application publication date: 19960214

Assignee: Guangdong OPPO Mobile Communications Co., Ltd.

Assignor: Blue light United Co., Ltd.

Contract record no.: 2014990000237

Denomination of invention: Method of protection of data reproduction, and reproduction apparatus providing protection of data reproduction

Granted publication date: 20010606

License type: Common License

Record date: 20140423

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
C17 Cessation of patent right
CX01 Expiry of patent term

Expiration termination date: 20150222

Granted publication date: 20010606